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Recently, at the "2014 China Optical Network Symposium," Wei Leping, director of the Science and Technology Committee of China Telecom Group, pointed out that optical devices are the bottleneck for the development of optical communications. Optical communications has become the slowest price reduction in all network composition technologies, in which optical devices are the bottleneck in bottlenecks.
Moore's Law only applies to electrical domain technologies such as packet, switching matrix, and storage, but it is not suitable for manual optical communication technologies. According to Wei Leping, in a typical 1,000-kilometer long-distance system, the cost of the optical domain will increase from 45% to 80 & above in 2015.
“According to China Telecom, a typical 80×100G, 1350 km (18×22 dB) wavelength division system, the optical domain cost accounts for about 75%, while in the optical domain cost, the optical device accounts for 90% of the total. About 70% of the total. A 100G core router, the optical device costs about 60%."
“Silicon photonics technology will become an important breakthrough direction.†Wei Leping said that the idea of ​​Si photonics (SiP) technology is to use existing CMOS integrated circuit investment, facilities, experience and technology to design, manufacture, package optical devices and optoelectronic integration. The circuit achieves the level of CMOS in terms of integration, manufacturability, and scalability, resulting in breakthroughs in cost, power consumption, and size.
Communication is an early application field of silicon photonics technology. Wei Leping said that, just as transistors, integrated circuits, and lasers in history, communication has often become an early application of new technologies because of its high-tech properties. Then, as the technology and process mature, it will be extended to the mass consumption field to form a larger scale, further reduce costs, and then promote its popularity in the field of communications, forming a virtuous circle of technology.